Exponential

class gammapy.astro.population.Exponential(amplitude=1, z_0=0.05, **kwargs)

Bases: astropy.modeling.Fittable1DModel

Exponential distribution.

\[f(z) = A \exp \left(- \frac{|z|}{z_0} \right)\]

Usually used for height distribution above the Galactic plane, with 0.05 kpc as a commonly used birth height distribution.

Parameters:

amplitude : float

See model formula

z_0 : float

Scale height of the distribution

See also

CaseBattacharya1998, Paczynski1990, YusifovKucuk2004, Lorimer2006, YusifovKucuk2004B, FaucherKaspi2006, Exponential

Attributes Summary

amplitude
evolved
param_names
z_0

Methods Summary

evaluate(z, amplitude, z_0)

One dimensional exponential model function

Attributes Documentation

amplitude

evolved = False

param_names = ('amplitude', 'z_0')

z_0

Methods Documentation

static evaluate(z, amplitude, z_0)

One dimensional exponential model function